W222 S550 spare tire
Thx, John
General Understanding ….
I have personally been thinking of going with Full Summer (Non Extended Mobility) Not Run Flats, separate discussion.... and full Winter Tires since I am in the NY area. However, I am stuck with the following.....
1. Stay with Extended Mobility All Season Tires Rougher ride, great steering response, risk damaging rims due to stiff sidewalls, no need to extra set of rims, no need to swap tires, long tread life, good balance in Dry/Wet/Snow conditions.
2. Get Winter Extended Mobility Tires and Summer Extended Mobility Tires. Stiff ride, Noisy, short tread life, (Winter, BEST FOR DRIVING IN SNOW AND SLUSH ( Almost 50% better in Traction and STOPPING distances.) Summer, BEST FOR DRIVING IN DRY/WET ( Almost 50% better in Traction and STOPPING distances ) Risk of damaging Rims due to Stiffer Side Wall.
3. Get a W221 Spare, eat up limited trunk space, Install Standard All Season
4. Get a W221 Spare, eat up limited trunk space, Use Non Extended Mobility Summer tires, *** However, they are noisier, and have thicker side walls and minimum useful thread life.
. . . and the stories, comments will go on and on and on and on....
Bottom line...…. Its a Personal Choice once you have all the data.
If stopping distances are most important, True Summer/Winter Extended Mobility or not.
If Noise / Comfort is most important, Non Extended Mobility, Non Dedicated Summer/Winter
If Rim Damage is biggest concern, Non Extended Mobility, Non Dedicated Summer
Yadda, Yadda, Yadda...
The above is my general observation from reading through tons of Zero's and One's...
Now, lets get the Nitro Fill going again...
Extended Mobility Tires are not Run-Flat
https://www.tirerack.com/tires/tiret...jsp?techid=234
Last edited by Nice Ride; Feb 10, 2019 at 02:56 PM.
Goodbye Mercedes. My new car list now has BMW, Audi, and Genesis models which I research as my hobby.
I'll insist on a spare and a CD player and probably get run flats also when it is time to buy.
Goodbye Mercedes. My new car list now has BMW, Audi, and Genesis models which I research as my hobby.
I'll insist on a spare and a CD player and probably get run flats also when it is time to buy.
Goodbye Mercedes. My new car list now has BMW, Audi, and Genesis models which I research as my hobby.
I'll insist on a spare and a CD player and probably get run flats also when it is time to buy.
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If you must drive further than 50 miles to reach help, do so. The downside is the distance driven beyond 50 miles reduces the probability the tire can be repaired.
Currently running on Bridgestone Drive Guards. Very satisfied with them. But the best part is knowing I will never be disabled on the hard shoulder, lying on my back with semi-trucks passing by three feet away at 70 mph. Damm scary!
Last edited by larrypmyers; Feb 11, 2019 at 11:52 AM.

I also considered the Audi A8 with the standard tires and spare in the trunk. But the reported history of catastrophic engine failure/ turbo issues with the Audi 4.0L turbo engine (which apparently has been remedied after 2016) kept me from pulling the trigger.
Last edited by bkdc; Feb 11, 2019 at 07:51 PM.
Last edited by blackbullit; Feb 28, 2019 at 06:54 AM.
I am in the process of buying a new 560 and have been doing the usual forum searches and such.
My .02, we have had 3 incidents of an unserviceable tire damage in our family over the last 50 years.
I have plugged a tire about 8 times, usually a slow leak from a nail or such.
I usually swap out run flats for non run flats when the RFs need replacement.
I do carry a small compressor and tire plug kit in the trunk.
If a spare tire is available from the manufacturer, I get one. Used that about 3 times in the last 50 years.
I don't think it is necessary to sacrifice trunk space to carry a spare............











